Support Zone-Aware Topologies in the KubeVirt CSI Driver

[moadqassem]

What this PR does / why we need it:
This pull request introduces support for zone-aware topology in the KubeVirt CSI driver. This enhancement allows the CSI driver to handle storage provisioning and attachment in multi-zone Kubernetes clusters. Integrates with Kubernetes topology-aware volume provisioners to ensure volumes are created in the same zone/region as the requesting node by:

• Implements support for TopologyKeys to enable zone/region-specific volume scheduling and attachment
• Modifies the Controller plugin to handle topology constraints during volume provisioning
• Updates to the Node plugin to include zone information in NodeGetInfo responses

Which issue(s) this PR fixes (optional, in fixes #<issue number>(, fixes #<issue_number>, ...) format, will close the issue(s) when PR gets merged):
Fixes #

Special notes for your reviewer:

Release note:

Support zone and region-aware topologies in the KubeVirt CSI Driver

[kubevirt-bot]

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[awels]

/test all

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[moadqassem]

@awels I have fixed some tests files that were failing and update the PR to resolve few conflicts. However, there were some other issues which I believe are not relevant to my PR:

I0114 23:43:26.714262   37496 create-pvc_test.go:608] Event: AttachVolume.Attach failed for volume "tenant-pv" : rpc error: code = Unknown desc = invalid volume name [FailedAttachVolume]

And

 failed to provision volume with StorageClass "kubevirt": rpc error: code = InvalidArgument desc = non-block volume with RWX access mode is not supported

I also took a quick look into the testing process and In order to add an e2e k8s test to make sure that the zone and region are respected, I must change few things in the kubevirtci cluster provider(or add a new provider, haven't looked deep so not sure). This is where it needs to be adjusted to add labels that points the allowed topology: https://github.com/kubevirt/kubevirtci/blob/a291de27bb596074c79729ea6f88533555f523fd/cluster-up/cluster/ephemeral-provider-common.sh#L90

Let me know what do you think?

[awels]

/test all

[awels]

Sorry been very busy with other stuff, I will try to take a look at this soon.

[awels]

If you look at the testing, we do actually exclude a few tests from the k8s test suite. In particular the RWX filesystem one, since we don't support that.

[moadqassem]

If you look at the testing, we do actually exclude a few tests from the k8s test suite. In particular the RWX filesystem one, since we don't support that.

I see. Alright let me check this filtering criteria.

[awels]

https://github.com/kubevirt/csi-driver/blob/main/hack/run-k8s-e2e.sh#L117-L128 is what we use, I believe the last skip is what skips the RWX filesystem test.

[awels]

Okay so I think I know what happened here, we made a change in how we identify which VM the volume is hotplugged into. Before we used the VMI, but that proved to be problematic, now we look at the VM directly. I am not sure if that affects how you look up VMs, it likely does.

[moadqassem]

Okay so I think I know what happened here, we made a change in how we identify which VM the volume is hotplugged into. Before we used the VMI, but that proved to be problematic, now we look at the VM directly. I am not sure if that affects how you look up VMs, it likely does.

hmm I don't think that I am listing or trying to get any VM as the code that I wrote is running on the DS which is in general deals with Node reference rather than the VM itself. The problem is, those tests are failing and I can't really check out what was the issue as you probably know the error traces(such as log messages) might come from other controllers which are not tracked. Also I noticed other PRs that have the exact failures. Do you know how we should proceed here ?

[awels]

/test all

[moadqassem]

@awels After taking a deeper look, seems that these lines of code here broke the VMs lookups to fetch VMs info from the CSINode object https://github.com/kubevirt/csi-driver/pull/130/files#diff-6cb93ab3a359a5bd44c54dbb81ac13c78f2051b868087906408564274b5e94bbR337-R349. These new additions, changed how we fetched those VMs where the volume attachments should be happening in regards how the CSINode node id is being processed.

[moadqassem]

@awels can you please rerun the ci tests again. I have tested my recent changes and I was able to fix the problem,

[awels]

/test all

[awels]

/test pull-csi-driver-split-k8s-suite-k8s

[awels]

PR looks good, one thing I forgot to ask about, did you enabled the topology tests in the k8s test suite. You can modify https://github.com/kubevirt/csi-driver/blob/main/hack/test-driver.yaml and set topology: true and that should be all that is needed to run the topology tests.

[awels]

/test all

[awels]

/test all

[kubevirt-bot]

@moadqassem: The following tests failed, say /retest to rerun all failed tests or /retest-required to rerun all mandatory failed tests:

Test name	Commit	Details	Required	Rerun command
pull-csi-driver-e2e-k8s	4b2711d	link	true	/test pull-csi-driver-e2e-k8s
pull-csi-driver-split-e2e-k8s	4b2711d	link	true	/test pull-csi-driver-split-e2e-k8s
pull-csi-driver-split-k8s-suite-k8s	4b2711d	link	true	/test pull-csi-driver-split-k8s-suite-k8s

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[awels]

Looks like we are having an issue with the tests when we enable topology here. I still have not had a change to look at why.

[kubevirt-bot]

Issues go stale after 90d of inactivity.
Mark the issue as fresh with /remove-lifecycle stale.
Stale issues rot after an additional 30d of inactivity and eventually close.

If this issue is safe to close now please do so with /close.

/lifecycle stale

[awels]

/remove-lifecycle stale